Small and medium sized bridges in the northern constructional climatic zone are at present built with the use of standardized plans specially worked out for this zone. Nevertheless there are many deficiencies. These constructions are divided into two groups: the first includes foundations on a natural or pile base with supporting grillage foundation constructed by the traditional foundation pit method. The second group contains pile base foundations of scaffold bridges, as well as other types of foundations with slab grilling lifted over the road surface. The first group is constructed with a significant volume of earth works in permafrost soils, work in the placing of monolithic concrete, as well as with significant change of the negative character in thermal mode of the frost foundation and the soil surrounding it. These changes are connected with defrosting of the frost soil of the foundation and the walls of the pits under the influence of heat elaboration of the monolithic concrete and its exothermic nature. The article goes on to discuss various problems connected with thermal regimens, seasonal work production, and various insufficiencies connected with both types of foundations. Fulcra with foundations of a columnar type are most promising in their technical economic, technological constructional and operational indices for any frosty-soil conditions, inasmuch as they allow the full exclusion of work consuming labor on the pit foundation, the completion of concrete work at low temperatures, full mechanization of all basic processes, and a significant decrease in work expenditures.

  • Supplemental Notes:
    • Abstract only is available in English, original untranslated as of November 1976.
  • Corporate Authors:

    Mezhdunarodnaya Kniga

    Smolenskaya Sennaya Pl 32/34
    Moscow G-200,   USSR 
  • Authors:
    • Solov'ev, G P
    • Blinkov, L S
    • Gugustsidze, G N
  • Publication Date: 1974


  • Russian

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00130265
  • Record Type: Publication
  • Source Agency: Federal Railroad Administration
  • Files: TRIS, USDOT
  • Created Date: Nov 23 1977 12:00AM